Mack Trucks Expands DEF Inducement Software Updates to Post-2010 Model Year Vehicles
Mack Trucks is rolling out updated diesel exhaust fluid inducement software to post-2010 vehicles, aligning with new EPA guidelines that raise final inducement speeds and extend repair windows.
- 25 mph
- 160 hours
- End of 2027
What Happened
Mack Trucks announced the expanded rollout of updated diesel exhaust fluid (DEF) inducement software across its entire vehicle portfolio going back to post-2010 models. The software aligns with new Environmental Protection Agency (EPA) guidance that raises final inducement speeds from 5 to 25 miles per hour and extends the repair window from 4 to 160 hours. The company began incorporating the update in May 2026 on Mack Pioneer and all-new Mack Anthem models with MP13 engines.
Updated software introduced on Mack Pioneer and all-new Mack Anthem with MP13 engines.
Software updates available for all 2024 and newer vehicles.
Availability expanded to all post-2014 vehicles.
All eligible post-2010 vehicles without remote update capability can receive software through dealers.
- 5 mph → 25 mph
- 4 hours → 160 hours
“Providing customers with practical solutions that support both compliance and operational efficiency remains a priority for Mack. By introducing this capability on new vehicles and establishing a clear path for legacy vehicle updates, we are helping customers maintain productivity while meeting evolving regulatory requirements.”
The updated software is designed to provide customers with a practical and streamlined path to compliance while supporting reliable vehicle operation. As Mack continues implementation across its product range, the company remains focused on delivering technology solutions that help fleets maximize uptime and operational performance.
Why this matters
The software update helps fleet owners maintain regulatory compliance without extended downtime. New EPA rules increase the final inducement speed from 5 mph to 25 mph and the repair window from 4 to 160 hours, giving drivers more time to address DEF system issues. This rollout covers vehicles from 2010 onward, ensuring even older trucks can stay compliant and operational.
Terms in This Story
- DEF
- Diesel exhaust fluid, a liquid used in selective catalytic reduction systems to reduce nitrogen oxide emissions from diesel engines.
- SCR
- Selective catalytic reduction, an emissions control technology that injects DEF into exhaust to convert NOx into nitrogen and water.
- Inducement
- A strategy that reduces vehicle speed or performance when the DEF system is not functioning properly, to encourage maintenance.
Summarised from the linked release; details can be imperfect — always verify against the original source.